Meter for air and gas mixtures.



No. 731,607. PATENTED JUNE 23, 1903. H. E. OVING.

METER FOR AIR AND GAS MIXTURES.

APPLICATION FILED MAR, 12, 1903.

A'ITGR NEYS No. 731,607. l ATENTED JUNE 23, 1903. H. E. OVING.

METER FOR AIR AND GAS MIXTURES.

APPLICATION FILED MAR. 12, 1903. N0 MODEL. 2 SHEETS-SHEET 2.

INVELNVOR JWMW@ A -rToRN YS T all whom it may concern.-

" for Air and Gas Mixtures, of which the fol# the-volume of the mixture discharged, which ture discharged by the apparatusnand which l beyond which the apparatus ceases to work;

` kade, Rotterdam, Netherlands, have inventtion through the axis of the apparatus. Fig.

partially filled withwater or other liquid and .receiver a is terminatedhat the upper part in a partitioned or divideddome c for the exit` i y of the gaseous mixture.

provided with spiral or-"Archimedean screws Ne. 731,607. l

HERMANUS ELLENS OVING, OF

Patented June 23, 1903.

FFICE.

PATENT ROTTERDAM, NETHERLANDS.

METER FOR AIR AND GAS IVIIXTURES.

SPECIFICATION formngpart of Letters Ilatent N o. 731,607, dated June 23, 1903.`

Application filed March 12, i903.

` Be it known that I, HERMAUS OVING, a subject of the Queen of the Netherlands, and a resident of 3l and 33 Geldersche ed a certain new and useful Improved Meter lowing is a specification.

This invention relates 'to an improved meter for gas and air mixtures which registers allows of controlling at any moment the proportion of air and gas contained in the mixallows of determining in advance the highest proportion of air entering in the mixture This limit can, besides, be changed as desired at any moment of the Work.

In the annexed drawings, Figure 1 is a vertical section through the chamber for the gasinlet. Fig. 2 is a longitudinal vertical sec- 3 is a front outside view. Fig. 4 is a horizontal section through the chamber for the gas-inlet, showin g the two water-gages. Fig. 5 is a section through the line 1 2 'of Fig. 4, and Fig. 6 is asection through the line 3 4 of Fig. 4.

The apparatus comprises, essentiallygla cylindrical receiver a, having'a horizontal axis l provided on one *side with a chamber b, projecting outward, in which the gas which has to' be mixed to the air enters by the tube c. The

y The inner space of the receiver a commuf nicates with the interior of the chamber b through the hole d made in the wall ofthe by the openings @made in thecylindrical up- The cylinder a is traversed for its length by a rotary shaft f, on which two'drums g g',

h h', are fixed.

The inner space of the drum g communicates with the chamber b through a U-shaped tube and by means of a tubular cap j, which covers the branch of the tube i, leading to A the chamber b. 'ed upward by a screw-threaded rod k, which SerialNo. 147,467. (No model.)

This tubular cap j is extendallows of lifting orlowering said cap by means of a nut Z. "A protecting'leaded casing fm incloses the nut Z and prevents anybody from varying the regulation by changing the height of the capj.

Theinner space of the drum g' communi- `Cates directly with the outside air through a U-shaped tube n.

On the 'wall of the chamber l) are secured two water-gages o and p, the one, o, adapted to give the Water-level in the chamber b or in the drum g and the othenp, adapted to give the Water-level in the drum g. For this pur pose the watergage o is directly in contact with the Water and the gas of the chamber b, while the water-gagep is in contact with the water of the chamber b,but not with the gas. A semicylindrical casing q surrounds this Water-gage and leads at the bottom to the water of the chamber and at the top to the outside air, so that the Water mounts up in said casing-that is to say, in the water-gage-to the same height as in the drum g', since it is air at theV pressure of the atmosphere that is discharged by said drum. Scales are arranged at the sides of these water-gages and allow of rendering account at once and at any moment of the proportion of gas and air contained in the mixture discharged by the meter, as will be hereinafter explained. The shaft fof the drums terminates at the chamber bin an endless-screw which engages a helical Wheel r,

` keyed on a vertical shaft s, which operates a counter of revolutions Finally the necessary quantity of Water is poured into the apparatus by a tubulure u, which is afterward closed by a plug, and the wateroverflow passes by way of a pipe yv to a lower chamber as, provided with a discharge-plug y. During the filling of the apparatus the plug/J is removed, and as soon as the water flows out by the corresponding opening the pouring is stopped.

Into the chamber o: leads the extension of one of the branches of the U-shaped tube t', with the view of conducting to said chamber the waste water deposited by the gas in the U-shaped tube.

The apparatus works as follows: Before it is started the Water-level is the same in the IOU cylindrical receiver a, in the chamber b, and in the drums g g. vlt' the pipe for the gasinlet of the apparatus is opened, the gas by its pressure causes the water-level to sink in' the chamber b to the bottom of the tubular cap j. The gas is then free to escape into the U-shaped tube 72 and from thence to the drum g, which causes both drums to rotate. The drum g' in turning sucks air through the Ufshapedtuben. Theairandgasdischarged by the drums enter the receiver a, pass from there tothe mixing-dome c, and then escape by the pipe w. The volume of the mixture discharged is measured by the counter t. As to the proportion of the gas and air volumes of the mixture, it depends on three elementslrst, of the diameter of the drums; second, of the pitch of the spiral screws of said drums, and, third, of the height of the water-level in said drums. Well, the diameters of the drums and the pitch ot' the spiral screws are invariable and known. It is only the heights of the water-levels that can vary. Therefore to have the composition of the mixture at any moment it is only necessary to know at that moment the exact height of the water-levels in thedrums. This is obtained by the simple examination ofthe scales arranged at the sides of the water-gages o and 3o p, one of which gives the water-level in the drum g and the other the water-level in the drum g. It may be understood, on the other hand, that if the pressure of the gas admitted diminishes, the free volume in the gas-dru m that is to say, the volume of the gas discharged-diminishes, while the free volume in the air-drum augments on account of the diminution of pressure in the receiver a. Therefore mixtures'very rich in air, which in certain cases would be explosive, could be formed if the apparatus was not provided with a special device; but on account of the tubular cap j, which controls the entrance of gas in the U-shaped tube i, and consequently in the drum g, the apparatus cannot work and the mixture cannot be formed unless the gas y admitted has a pressure high enough to cause I desired moment, by raising -or lowering the water, in combination with a partitioned dome c through which passes the mixture, a rotary shaft fjournaled in the end walls ofthe cylinder, two drums g and g' secured to the shaft f, spiral screws h and h arranged respectively in the drums and rotating therewith, a chamber b fixed at one end of the cylinder d and communicating at the top with the gas-inlet and at the bottom with the interior of the cyl-- inder, a U -shaped tube secured to one of the end walls of.the cylinder a and having one branch leading to the top part of the chamber b and the otherbranch to the drum g, a

tubular capj which covers the branch of the tube t' leading to the chamber b, a screwthreaded rod 7o ixed to the cap j, a -nut Z mounted on said rod outside the chamber Z), a leaded casing m covering the nut Z and its rod 7c, a U-shaped tube nsecured to the other end of the cylinder a and having one branch leading to the outside air and the other branch to the drum g', a vwater-gage o placed in the chamber b and in contact with the water and gas contained in said chamber, a water-gage p placed in the chamber b, a casing qseparating said water-gage p from the space ofthe chamber b lled with gas and leading at the bottom into the liquid of the chamber and at the top into the outside air, an overflow-tube o, an overilow-chamber or, an endless screw formed at one end of the shaft of the cylinder, a helical wheel r engaging said endless screw, a vertical shaft s driven by said wheel and a counter t controlled by the shaft s, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

HERMANUS ELLENS OVING.

Witnesses:

JACOB GILLES LoUIs RIJNBERG, JOHANNES D. FUHRING. 

